From Frenchduvet, from Middle French, from Old French duvet (“down, the feathers of young birds”), alteration of dumet, dumect, from Old French dum, dun (“down, feathers”), from Old Norse dúnn (“down, down feather”), from Proto-Germanic*dūnaz (“down”), from Proto-Indo-European*dhūw- (“to smoke, fume, raise dust”). Cognate with Icelandicdúnn (“down”), Danishdun (“down”), GermanDaune (“down”). More at down.